Design of low-power single-stage operational amplifiers based on an optimized settling model

Authors:
Hamed Aminzadeh;Reza Lotfi;Khalil Mafinezhad
Affiliations:
Integrated Systems Laboratory, EE Department, Ferdowsi University of Mashhad, Mashhad, Iran;Integrated Systems Laboratory, EE Department, Ferdowsi University of Mashhad, Mashhad, Iran;Integrated Systems Laboratory, EE Department, Ferdowsi University of Mashhad, Mashhad, Iran
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2009

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Abstract

Settling behavior of operational amplifiers (opamps) is important in many analog signal-processing applications. In this paper, the analysis of single-stage opamps based on settling time has been performed. A simple yet accurate model for the settling response of first-order opamps that modifies conventional models is proposed to revise the equations. The presented approach leads to a new simple settling-based design methodology for single-stage operational amplifiers. Circuit-level simulations demonstrate the effectiveness of the procedure.